I'm making MacsMom Orange Dreamsicle recipe below and I was able to find the DH Orange Supreme mix she mentions at the end of the recipe, but after putting everything together in the recipe with the orange supreme cake mix (without the melted orange sherbet) the recipe is really thick. According to the WASC recipe below, that the orange one is based off of, it seems like I'm missing 2 cups of liquid because I took the orange sherbet out - Do I just add 2 cups of water? I don't have anything else here and it is sitting in the mixing bowl as I type. I did put in the 2/3 c diet orange sunkist soda. Thanks!

Orange Dreamsicle - MacsMom 

2 boxes white cake mix

2 c melted orange sherbet

2/3 c diet orange soda (soda suggested by cinderspritzer: "I added ... diet sunkist soda.... and it tastes FREAKING AWESOME!!!")

2 c flour 

1-3/4 c sugar 

1-1/2 tsp salt

1/2 tsp baking soda (modified to add baking soda 3/10/10)

2 c sour cream

9 egg whites 

1/4 c oil 

1 T orange extract

*Perhaps some food coloring

*Update: DH Orange Supreme is now available in more stores, I suggest using the DH mix over using orange sherbet, as it seems several of you still have issues with the cake sinking using sherbet. If you can’t find the DH mix, using a dram of LoRann Orangeoil works just fine for flavoring, along with diet orange soda, if your sherbet causes the cake to sink.